The Optical Properties of Ammonia Treated TiO2 Nanostructure Prepared by Liquid Phase Deposition Method

Siti Khatijah Md Saad; Akrajas Ali Umar; Mohd Yusri Abd Rahman; Muhamad Mat Salleh

doi:10.4028/www.scientific.net/AMR.364.470

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The Optical Properties of Ammonia Treated TiO₂ Nanostructure Prepared by Liquid Phase Deposition Method

Abstract:

. TiO₂ was known for its potential in solar cell and photocatalyst application. However the usage of anatase TiO₂ in solar cell application has its own disadvantage as TiO₂ spectrum was limited to ultraviolet (UV) light limiting its application. It was found that the broader optical absorption of TiO₂ can be obtained by nitrogen doping. This paper report the optical properties study of ammonia treated TiO₂nanostructures with various percentage concentration of ammonia. The TiO₂ nanostructures was prepared by liquid phase deposition (LPD) method using on ITO substrate and annealed at 450 °C for 1h. The TiO₂ nanostructures were characterized with rod-like morphology with length and diameter of ca. 100 nm and ca. 100 nm respectively that vertically oriented on the surface. The optical properties of the samples exhibit strong band near the UV region. The optical properties drastically changed if the samples treated with ammonia, of which exhibit the present of broader absorption band in the visible region. The TiO₂treated ammonia should be find used in photoelectrochemical (PEC) solar cell application.